refactor: 删除未实现的 call-function API

- 该功能与 dynamic-code/:key/execute 重复
- 保持代码整洁，移除无用代码

backend/internal/router/app/cloud.go

@@ -33,7 +33,6 @@ func SetupCloudRoutes(r *gin.RouterGroup) {
 	r.POST("/variables/:key/records", handleAppCreateVariableRecord)
 	r.GET("/variables/:key/records", handleAppGetVariableRecords)
 	r.DELETE("/variables/:key/records/:record_id", handleAppDeleteVariableRecord)
-	r.POST("/call-function", handleAppCallFunction)
 }
 
 func handleAppGetConstants(c *gin.Context) {
@@ -674,34 +673,6 @@ func handleAppUploadVariableBinary(c *gin.Context) {
 	})
 }
 
-func handleAppCallFunction(c *gin.Context) {
-	appKey := c.Param("appKey")
-	var app model.Application
-	if err := database.DB.Where("app_key = ?", appKey).First(&app).Error; err != nil {
-		response.Error(c, 404, "应用不存在")
-		return
-	}
-
-	if service.GetApplicationDisabledStatus(app.ID) {
-		response.Error(c, 403, "该应用已被禁用")
-		return
-	}
-
-	var req struct {
-		UserID uint                   `json:"user_id"`
-		Name   string                 `json:"name"`
-		Params map[string]interface{} `json:"params"`
-	}
-	if err := c.ShouldBindJSON(&req); err != nil {
-		response.Error(c, 400, "参数错误")
-		return
-	}
-
-	response.Success(c, gin.H{
-		"result": nil,
-	})
-}
-
 func handleAppCreateVariableRecord(c *gin.Context) {
 	appKey := c.Param("appKey")
 	key := c.Param("key")